Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bdabcbf0c22d0b6…

MALICIOUS

PDF

48.9 KB Created: 2021-06-04 03:54:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 92c463365bbf471814bb0125fc961039 SHA-1: 6cf47c7c3334a7532ad71723889e1857fc56b941 SHA-256: 4bdabcbf0c22d0b6984934d2f1ac36b02db5a9045be561183a1a31316aec4d48
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as 'game hacks' or 'free robux'. The ML classifier also flagged this PDF as malicious. These findings indicate the document's primary purpose is to redirect users to potentially harmful websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/431946152/roblox-hackers-list-game-hack In PDF document text
    • http://lib.mappifhui.org/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-e-free_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-tiradas-gratis-link_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/withdraw-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/optifine-pe_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f5d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F5D 29528 bytes
SHA-256: 3d3404b7e77ea61ca0117009eceee63272a050f9af5e0b217d62d4b9929e4ce5
font_01_sfnt_off0000925d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x925D 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C0F 18408 bytes
SHA-256: 45c5ba74f98a8c25ccf9e099d511e9a8e2c804404353a175448a141859ab4e90

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